[dart-dio] Adds support for generating inline enums (#5668)

* [dart-dio] Adds support for generating inline enums

Previously these were generated as strings if declared inline in the spec.

* Adds more detailed comment about inline enums

modules/openapi-generator/src/main/resources/dart-dio/class.mustache

@@ -11,7 +11,7 @@ abstract class {{classname}} implements Built<{{classname}}, {{classname}}Builde
         @nullable
     {{/isNullable}}
     @BuiltValueField(wireName: r'{{baseName}}')
-    {{{dataType}}} get {{name}};
+    {{#isEnum}}{{classname}}{{{nameInCamelCase}}}{{/isEnum}}{{^isEnum}}{{{dataType}}}{{/isEnum}} get {{name}};
     {{#allowableValues}}
         {{#min}} // range from {{min}} to {{max}}{{/min}}//{{^min}}enum {{name}}Enum { {{#values}} {{.}}, {{/values}} };{{/min}}
     {{/allowableValues}}
@@ -22,5 +22,17 @@ abstract class {{classname}} implements Built<{{classname}}, {{classname}}Builde
 
     factory {{classname}}([updates({{classname}}Builder b)]) = _${{classname}};
     static Serializer<{{classname}}> get serializer => _${{classVarName}}Serializer;
-
 }
+{{!
+    Generate an enum for any variables that are declared as inline enums
+    isEnum is only true for inline variables that are enums.
+    If an enum is declared as a definition, isEnum is false and the enum is generated from the
+    enum.mustache template.
+}}
+{{#vars}}
+    {{#isEnum}}
+
+{{>enum_inline}}
+
+    {{/isEnum}}
+{{/vars}}

modules/openapi-generator/src/main/resources/dart-dio/enum_inline.mustache

@@ -0,0 +1,19 @@
+class {{classname}}{{nameInCamelCase}} extends EnumClass {
+
+  {{#allowableValues}}
+    {{#enumVars}}
+      {{#description}}
+  /// {{description}}
+      {{/description}}
+  @BuiltValueEnumConst(wireName: {{{value}}})
+  static const {{classname}}{{nameInCamelCase}} {{name}} = _${{name}};
+    {{/enumVars}}
+  {{/allowableValues}}
+
+  static Serializer<{{classname}}{{nameInCamelCase}}> get serializer => _${{classVarName}}{{nameInCamelCase}}Serializer;
+
+  const {{classname}}{{nameInCamelCase}}._(String name): super(name);
+
+  static BuiltSet<{{classname}}{{nameInCamelCase}}> get values => _${{classVarName}}{{nameInCamelCase}}Values;
+  static {{classname}}{{nameInCamelCase}} valueOf(String name) => _${{classVarName}}{{nameInCamelCase}}ValueOf(name);
+}

samples/client/petstore/dart-dio/.openapi-generator/VERSION

@@ -1 +1 @@
-5.0.0-SNAPSHOT
+5.0.0-SNAPSHOT

samples/client/petstore/dart-dio/lib/model/api_response.dart

@@ -23,6 +23,5 @@ abstract class ApiResponse implements Built<ApiResponse, ApiResponseBuilder> {
 
     factory ApiResponse([updates(ApiResponseBuilder b)]) = _$ApiResponse;
     static Serializer<ApiResponse> get serializer => _$apiResponseSerializer;
-
 }
 

samples/client/petstore/dart-dio/lib/model/category.dart

@@ -19,6 +19,5 @@ abstract class Category implements Built<Category, CategoryBuilder> {
 
     factory Category([updates(CategoryBuilder b)]) = _$Category;
     static Serializer<Category> get serializer => _$categorySerializer;
-
 }
 

samples/client/petstore/dart-dio/lib/model/order.dart

@@ -24,7 +24,7 @@ abstract class Order implements Built<Order, OrderBuilder> {
     /* Order Status */
         @nullable
     @BuiltValueField(wireName: r'status')
-    String get status;
+    OrderStatus get status;
         //enum statusEnum {  placed,  approved,  delivered,  };
     
         @nullable
@@ -36,6 +36,26 @@ abstract class Order implements Built<Order, OrderBuilder> {
 
     factory Order([updates(OrderBuilder b)]) = _$Order;
     static Serializer<Order> get serializer => _$orderSerializer;
-
 }
 
+class OrderStatus extends EnumClass {
+
+  /// Order Status
+  @BuiltValueEnumConst(wireName: "placed")
+  static const OrderStatus placed = _$placed;
+  /// Order Status
+  @BuiltValueEnumConst(wireName: "approved")
+  static const OrderStatus approved = _$approved;
+  /// Order Status
+  @BuiltValueEnumConst(wireName: "delivered")
+  static const OrderStatus delivered = _$delivered;
+
+  static Serializer<OrderStatus> get serializer => _$orderStatusSerializer;
+
+  const OrderStatus._(String name): super(name);
+
+  static BuiltSet<OrderStatus> get values => _$orderStatusValues;
+  static OrderStatus valueOf(String name) => _$orderStatusValueOf(name);
+}
+
+

samples/client/petstore/dart-dio/lib/model/pet.dart

@@ -31,7 +31,7 @@ abstract class Pet implements Built<Pet, PetBuilder> {
     /* pet status in the store */
         @nullable
     @BuiltValueField(wireName: r'status')
-    String get status;
+    PetStatus get status;
         //enum statusEnum {  available,  pending,  sold,  };
 
     // Boilerplate code needed to wire-up generated code
@@ -39,6 +39,26 @@ abstract class Pet implements Built<Pet, PetBuilder> {
 
     factory Pet([updates(PetBuilder b)]) = _$Pet;
     static Serializer<Pet> get serializer => _$petSerializer;
-
 }
 
+class PetStatus extends EnumClass {
+
+  /// pet status in the store
+  @BuiltValueEnumConst(wireName: "available")
+  static const PetStatus available = _$available;
+  /// pet status in the store
+  @BuiltValueEnumConst(wireName: "pending")
+  static const PetStatus pending = _$pending;
+  /// pet status in the store
+  @BuiltValueEnumConst(wireName: "sold")
+  static const PetStatus sold = _$sold;
+
+  static Serializer<PetStatus> get serializer => _$petStatusSerializer;
+
+  const PetStatus._(String name): super(name);
+
+  static BuiltSet<PetStatus> get values => _$petStatusValues;
+  static PetStatus valueOf(String name) => _$petStatusValueOf(name);
+}
+
+

samples/client/petstore/dart-dio/lib/model/tag.dart

@@ -19,6 +19,5 @@ abstract class Tag implements Built<Tag, TagBuilder> {
 
     factory Tag([updates(TagBuilder b)]) = _$Tag;
     static Serializer<Tag> get serializer => _$tagSerializer;
-
 }
 

samples/client/petstore/dart-dio/lib/model/user.dart

@@ -43,6 +43,5 @@ abstract class User implements Built<User, UserBuilder> {
 
     factory User([updates(UserBuilder b)]) = _$User;
     static Serializer<User> get serializer => _$userSerializer;
-
 }